./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:19:36,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:19:36,892 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:19:36,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:19:36,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:19:36,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:19:36,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:19:36,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:19:36,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:19:36,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:19:36,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:19:36,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:19:36,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:19:36,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:19:36,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:19:36,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:19:36,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:19:36,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:19:36,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:19:36,950 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:19:36,952 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:19:36,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:19:36,955 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:19:36,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:19:36,961 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:19:36,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:19:36,962 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:19:36,963 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:19:36,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:19:36,965 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:19:36,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:19:36,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:19:36,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:19:36,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:19:36,970 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:19:36,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:19:36,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:19:36,972 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:19:36,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:19:36,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:19:36,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:19:36,976 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:19:37,000 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:19:37,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:19:37,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:19:37,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:19:37,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:19:37,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:19:37,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:19:37,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:19:37,005 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:19:37,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:19:37,005 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:19:37,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:19:37,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:19:37,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:19:37,006 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:19:37,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:19:37,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:19:37,007 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:19:37,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:19:37,008 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:19:37,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:19:37,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:19:37,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:19:37,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:19:37,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:19:37,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:19:37,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:19:37,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:19:37,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:19:37,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:19:37,011 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:19:37,011 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:19:37,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:19:37,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc27937a34d27b10c960489127716dfcbd25a3140e1829dbc6f42b419387a4e7 [2022-11-18 20:19:37,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:19:37,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:19:37,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:19:37,362 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:19:37,363 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:19:37,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-18 20:19:37,450 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/data/cd02a4806/500b8e0324ca4afcb83fcbafc7218a08/FLAGf1f9cfcbf [2022-11-18 20:19:37,978 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:19:37,979 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/sv-benchmarks/c/weaver/test-easy1.wvr.c [2022-11-18 20:19:37,987 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/data/cd02a4806/500b8e0324ca4afcb83fcbafc7218a08/FLAGf1f9cfcbf [2022-11-18 20:19:38,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/data/cd02a4806/500b8e0324ca4afcb83fcbafc7218a08 [2022-11-18 20:19:38,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:19:38,357 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:19:38,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:38,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:19:38,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:19:38,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d8e63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38, skipping insertion in model container [2022-11-18 20:19:38,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:19:38,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:19:38,612 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-18 20:19:38,621 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:38,633 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:19:38,653 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/sv-benchmarks/c/weaver/test-easy1.wvr.c[1876,1889] [2022-11-18 20:19:38,657 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:19:38,672 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:19:38,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38 WrapperNode [2022-11-18 20:19:38,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:19:38,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:38,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:19:38,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:19:38,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,715 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2022-11-18 20:19:38,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:19:38,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:19:38,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:19:38,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:19:38,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,741 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,745 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:19:38,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:19:38,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:19:38,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:19:38,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (1/1) ... [2022-11-18 20:19:38,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:19:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:38,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:19:38,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:19:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:19:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 20:19:38,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 20:19:38,857 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 20:19:38,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 20:19:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:19:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:19:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:19:38,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:19:38,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:19:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:19:38,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:19:38,861 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:19:39,009 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:19:39,012 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:19:39,284 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:19:39,294 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:19:39,295 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:19:39,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:39 BoogieIcfgContainer [2022-11-18 20:19:39,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:19:39,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:19:39,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:19:39,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:19:39,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:19:38" (1/3) ... [2022-11-18 20:19:39,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f639abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:19:39, skipping insertion in model container [2022-11-18 20:19:39,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:19:38" (2/3) ... [2022-11-18 20:19:39,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f639abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:19:39, skipping insertion in model container [2022-11-18 20:19:39,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:19:39" (3/3) ... [2022-11-18 20:19:39,309 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy1.wvr.c [2022-11-18 20:19:39,319 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:19:39,332 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:19:39,332 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:19:39,332 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:19:39,419 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 20:19:39,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 84 transitions, 184 flow [2022-11-18 20:19:39,537 INFO L130 PetriNetUnfolder]: 6/82 cut-off events. [2022-11-18 20:19:39,538 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:19:39,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 82 events. 6/82 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-18 20:19:39,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 84 transitions, 184 flow [2022-11-18 20:19:39,550 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 74 places, 73 transitions, 158 flow [2022-11-18 20:19:39,561 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:19:39,570 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@544d35c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:19:39,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:19:39,603 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2022-11-18 20:19:39,603 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 20:19:39,604 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:39,605 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:39,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:39,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:39,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1149725056, now seen corresponding path program 1 times [2022-11-18 20:19:39,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767380759] [2022-11-18 20:19:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:39,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:39,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:39,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767380759] [2022-11-18 20:19:39,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767380759] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:39,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:39,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:19:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980323603] [2022-11-18 20:19:39,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:19:39,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:39,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:19:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:19:39,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 84 [2022-11-18 20:19:39,967 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 158 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:39,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:39,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 84 [2022-11-18 20:19:39,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:40,057 INFO L130 PetriNetUnfolder]: 2/69 cut-off events. [2022-11-18 20:19:40,061 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-18 20:19:40,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 69 events. 2/69 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 34 event pairs, 0 based on Foata normal form. 6/71 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-18 20:19:40,064 INFO L137 encePairwiseOnDemand]: 80/84 looper letters, 4 selfloop transitions, 0 changer transitions 2/69 dead transitions. [2022-11-18 20:19:40,064 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 158 flow [2022-11-18 20:19:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:19:40,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 20:19:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 158 transitions. [2022-11-18 20:19:40,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9404761904761905 [2022-11-18 20:19:40,079 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 158 transitions. [2022-11-18 20:19:40,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 158 transitions. [2022-11-18 20:19:40,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:40,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 158 transitions. [2022-11-18 20:19:40,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 79.0) internal successors, (158), 2 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,092 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,095 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 158 flow. Second operand 2 states and 158 transitions. [2022-11-18 20:19:40,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 158 flow [2022-11-18 20:19:40,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 150 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-18 20:19:40,102 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 138 flow [2022-11-18 20:19:40,104 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=138, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2022-11-18 20:19:40,108 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, -3 predicate places. [2022-11-18 20:19:40,109 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 138 flow [2022-11-18 20:19:40,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,109 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:40,109 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:40,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:19:40,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:40,111 INFO L85 PathProgramCache]: Analyzing trace with hash 807026320, now seen corresponding path program 1 times [2022-11-18 20:19:40,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:40,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962692771] [2022-11-18 20:19:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:40,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:40,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:40,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962692771] [2022-11-18 20:19:40,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962692771] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:40,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:40,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:19:40,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686693758] [2022-11-18 20:19:40,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:40,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:19:40,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:40,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:19:40,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:19:40,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-18 20:19:40,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 138 flow. Second operand has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:40,740 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-18 20:19:40,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:40,958 INFO L130 PetriNetUnfolder]: 61/207 cut-off events. [2022-11-18 20:19:40,961 INFO L131 PetriNetUnfolder]: For 10/22 co-relation queries the response was YES. [2022-11-18 20:19:40,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349 conditions, 207 events. 61/207 cut-off events. For 10/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 706 event pairs, 24 based on Foata normal form. 2/175 useless extension candidates. Maximal degree in co-relation 346. Up to 84 conditions per place. [2022-11-18 20:19:40,966 INFO L137 encePairwiseOnDemand]: 76/84 looper letters, 29 selfloop transitions, 5 changer transitions 4/81 dead transitions. [2022-11-18 20:19:40,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 245 flow [2022-11-18 20:19:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:19:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 410 transitions. [2022-11-18 20:19:40,975 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6972789115646258 [2022-11-18 20:19:40,978 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 410 transitions. [2022-11-18 20:19:40,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 410 transitions. [2022-11-18 20:19:40,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:40,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 410 transitions. [2022-11-18 20:19:40,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.57142857142857) internal successors, (410), 7 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,993 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:40,994 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 138 flow. Second operand 7 states and 410 transitions. [2022-11-18 20:19:40,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 245 flow [2022-11-18 20:19:40,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 245 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:19:40,998 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 165 flow [2022-11-18 20:19:40,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2022-11-18 20:19:41,001 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2022-11-18 20:19:41,001 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 165 flow [2022-11-18 20:19:41,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 55.57142857142857) internal successors, (389), 7 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,002 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:41,003 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:41,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:19:41,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,009 INFO L85 PathProgramCache]: Analyzing trace with hash -542410267, now seen corresponding path program 1 times [2022-11-18 20:19:41,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614231810] [2022-11-18 20:19:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614231810] [2022-11-18 20:19:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614231810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:41,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:41,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:19:41,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349646068] [2022-11-18 20:19:41,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:41,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:41,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:41,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:41,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:19:41,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-18 20:19:41,293 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:41,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-18 20:19:41,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:41,531 INFO L130 PetriNetUnfolder]: 53/200 cut-off events. [2022-11-18 20:19:41,532 INFO L131 PetriNetUnfolder]: For 20/35 co-relation queries the response was YES. [2022-11-18 20:19:41,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 200 events. 53/200 cut-off events. For 20/35 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 711 event pairs, 7 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 364. Up to 58 conditions per place. [2022-11-18 20:19:41,540 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 33 selfloop transitions, 12 changer transitions 4/92 dead transitions. [2022-11-18 20:19:41,541 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 324 flow [2022-11-18 20:19:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:19:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 420 transitions. [2022-11-18 20:19:41,549 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2022-11-18 20:19:41,550 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 420 transitions. [2022-11-18 20:19:41,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 420 transitions. [2022-11-18 20:19:41,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:41,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 420 transitions. [2022-11-18 20:19:41,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.0) internal successors, (420), 7 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,559 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,559 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 165 flow. Second operand 7 states and 420 transitions. [2022-11-18 20:19:41,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 324 flow [2022-11-18 20:19:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 92 transitions, 311 flow, removed 2 selfloop flow, removed 5 redundant places. [2022-11-18 20:19:41,567 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 219 flow [2022-11-18 20:19:41,567 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2022-11-18 20:19:41,570 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 6 predicate places. [2022-11-18 20:19:41,570 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 219 flow [2022-11-18 20:19:41,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,571 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:41,571 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:41,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:19:41,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:41,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 920803105, now seen corresponding path program 2 times [2022-11-18 20:19:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:41,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443163390] [2022-11-18 20:19:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:41,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:41,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443163390] [2022-11-18 20:19:41,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443163390] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:41,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:41,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:19:41,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893422532] [2022-11-18 20:19:41,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:41,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:41,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:19:41,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-18 20:19:41,845 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 219 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:41,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:41,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-18 20:19:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:42,021 INFO L130 PetriNetUnfolder]: 50/198 cut-off events. [2022-11-18 20:19:42,022 INFO L131 PetriNetUnfolder]: For 96/102 co-relation queries the response was YES. [2022-11-18 20:19:42,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 433 conditions, 198 events. 50/198 cut-off events. For 96/102 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 699 event pairs, 14 based on Foata normal form. 8/202 useless extension candidates. Maximal degree in co-relation 425. Up to 46 conditions per place. [2022-11-18 20:19:42,026 INFO L137 encePairwiseOnDemand]: 73/84 looper letters, 31 selfloop transitions, 17 changer transitions 4/95 dead transitions. [2022-11-18 20:19:42,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 95 transitions, 400 flow [2022-11-18 20:19:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:42,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:19:42,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2022-11-18 20:19:42,029 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7108843537414966 [2022-11-18 20:19:42,029 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2022-11-18 20:19:42,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2022-11-18 20:19:42,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:42,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2022-11-18 20:19:42,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,035 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,038 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 219 flow. Second operand 7 states and 418 transitions. [2022-11-18 20:19:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 95 transitions, 400 flow [2022-11-18 20:19:42,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 95 transitions, 396 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:19:42,047 INFO L231 Difference]: Finished difference. Result has 88 places, 80 transitions, 317 flow [2022-11-18 20:19:42,048 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=88, PETRI_TRANSITIONS=80} [2022-11-18 20:19:42,050 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 14 predicate places. [2022-11-18 20:19:42,051 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 80 transitions, 317 flow [2022-11-18 20:19:42,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,053 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:42,059 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:19:42,060 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:42,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:42,063 INFO L85 PathProgramCache]: Analyzing trace with hash 201255641, now seen corresponding path program 1 times [2022-11-18 20:19:42,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:42,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747681212] [2022-11-18 20:19:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:42,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:42,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747681212] [2022-11-18 20:19:42,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747681212] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889150610] [2022-11-18 20:19:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:42,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:42,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:42,299 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:42,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:19:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:19:42,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:42,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:42,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889150610] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:42,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:19:42,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2022-11-18 20:19:42,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481541583] [2022-11-18 20:19:42,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:42,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:19:42,964 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-18 20:19:42,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 80 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:42,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:42,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-18 20:19:42,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:43,116 INFO L130 PetriNetUnfolder]: 49/229 cut-off events. [2022-11-18 20:19:43,116 INFO L131 PetriNetUnfolder]: For 415/415 co-relation queries the response was YES. [2022-11-18 20:19:43,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 611 conditions, 229 events. 49/229 cut-off events. For 415/415 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 787 event pairs, 17 based on Foata normal form. 7/233 useless extension candidates. Maximal degree in co-relation 599. Up to 79 conditions per place. [2022-11-18 20:19:43,120 INFO L137 encePairwiseOnDemand]: 74/84 looper letters, 48 selfloop transitions, 12 changer transitions 1/104 dead transitions. [2022-11-18 20:19:43,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 559 flow [2022-11-18 20:19:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:19:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-18 20:19:43,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2022-11-18 20:19:43,123 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7242063492063492 [2022-11-18 20:19:43,123 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 365 transitions. [2022-11-18 20:19:43,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 365 transitions. [2022-11-18 20:19:43,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:43,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 365 transitions. [2022-11-18 20:19:43,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 60.833333333333336) internal successors, (365), 6 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,127 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 84.0) internal successors, (588), 7 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,127 INFO L175 Difference]: Start difference. First operand has 88 places, 80 transitions, 317 flow. Second operand 6 states and 365 transitions. [2022-11-18 20:19:43,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 559 flow [2022-11-18 20:19:43,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 553 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-18 20:19:43,138 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 380 flow [2022-11-18 20:19:43,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=380, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2022-11-18 20:19:43,141 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 19 predicate places. [2022-11-18 20:19:43,141 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 380 flow [2022-11-18 20:19:43,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,142 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:43,142 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:43,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:43,356 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:43,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1876192723, now seen corresponding path program 2 times [2022-11-18 20:19:43,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:43,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133041306] [2022-11-18 20:19:43,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:43,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:43,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133041306] [2022-11-18 20:19:43,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133041306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:43,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:43,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:19:43,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194210922] [2022-11-18 20:19:43,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:43,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:19:43,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:43,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:19:43,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:19:43,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 84 [2022-11-18 20:19:43,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:43,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 84 [2022-11-18 20:19:43,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:43,677 INFO L130 PetriNetUnfolder]: 50/222 cut-off events. [2022-11-18 20:19:43,678 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2022-11-18 20:19:43,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 222 events. 50/222 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 765 event pairs, 13 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 634. Up to 60 conditions per place. [2022-11-18 20:19:43,682 INFO L137 encePairwiseOnDemand]: 75/84 looper letters, 41 selfloop transitions, 11 changer transitions 3/98 dead transitions. [2022-11-18 20:19:43,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 98 transitions, 567 flow [2022-11-18 20:19:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:19:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 20:19:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 414 transitions. [2022-11-18 20:19:43,686 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7040816326530612 [2022-11-18 20:19:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 414 transitions. [2022-11-18 20:19:43,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 414 transitions. [2022-11-18 20:19:43,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:43,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 414 transitions. [2022-11-18 20:19:43,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,690 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 84.0) internal successors, (672), 8 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,691 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 380 flow. Second operand 7 states and 414 transitions. [2022-11-18 20:19:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 98 transitions, 567 flow [2022-11-18 20:19:43,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 558 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-11-18 20:19:43,700 INFO L231 Difference]: Finished difference. Result has 98 places, 84 transitions, 417 flow [2022-11-18 20:19:43,701 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=98, PETRI_TRANSITIONS=84} [2022-11-18 20:19:43,705 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 24 predicate places. [2022-11-18 20:19:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 84 transitions, 417 flow [2022-11-18 20:19:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:43,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:43,709 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:43,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:19:43,710 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:43,710 INFO L85 PathProgramCache]: Analyzing trace with hash -946876456, now seen corresponding path program 1 times [2022-11-18 20:19:43,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:43,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930876352] [2022-11-18 20:19:43,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:43,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:44,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:44,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930876352] [2022-11-18 20:19:44,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930876352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:44,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579609742] [2022-11-18 20:19:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:44,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:44,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:44,057 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:44,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:19:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:44,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:19:44,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:44,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:45,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579609742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:45,029 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:45,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 24 [2022-11-18 20:19:45,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71215979] [2022-11-18 20:19:45,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:45,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:19:45,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:45,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:19:45,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:19:45,033 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:45,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 84 transitions, 417 flow. Second operand has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:45,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:45,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:45,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:48,002 INFO L130 PetriNetUnfolder]: 174/589 cut-off events. [2022-11-18 20:19:48,003 INFO L131 PetriNetUnfolder]: For 2127/2127 co-relation queries the response was YES. [2022-11-18 20:19:48,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1941 conditions, 589 events. 174/589 cut-off events. For 2127/2127 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3251 event pairs, 4 based on Foata normal form. 24/610 useless extension candidates. Maximal degree in co-relation 1924. Up to 82 conditions per place. [2022-11-18 20:19:48,010 INFO L137 encePairwiseOnDemand]: 65/84 looper letters, 110 selfloop transitions, 150 changer transitions 5/306 dead transitions. [2022-11-18 20:19:48,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 306 transitions, 2396 flow [2022-11-18 20:19:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-18 20:19:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2022-11-18 20:19:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3404 transitions. [2022-11-18 20:19:48,021 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6536098310291859 [2022-11-18 20:19:48,021 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3404 transitions. [2022-11-18 20:19:48,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3404 transitions. [2022-11-18 20:19:48,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:48,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3404 transitions. [2022-11-18 20:19:48,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 54.903225806451616) internal successors, (3404), 62 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:48,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:48,047 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 84.0) internal successors, (5292), 63 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:48,047 INFO L175 Difference]: Start difference. First operand has 98 places, 84 transitions, 417 flow. Second operand 62 states and 3404 transitions. [2022-11-18 20:19:48,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 306 transitions, 2396 flow [2022-11-18 20:19:48,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 306 transitions, 2298 flow, removed 42 selfloop flow, removed 4 redundant places. [2022-11-18 20:19:48,063 INFO L231 Difference]: Finished difference. Result has 179 places, 219 transitions, 1781 flow [2022-11-18 20:19:48,063 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=1781, PETRI_PLACES=179, PETRI_TRANSITIONS=219} [2022-11-18 20:19:48,064 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 105 predicate places. [2022-11-18 20:19:48,064 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 219 transitions, 1781 flow [2022-11-18 20:19:48,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 53.583333333333336) internal successors, (1286), 24 states have internal predecessors, (1286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:48,065 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:48,066 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:48,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:48,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:48,273 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:48,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1773717672, now seen corresponding path program 2 times [2022-11-18 20:19:48,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:48,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771149537] [2022-11-18 20:19:48,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:48,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:48,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771149537] [2022-11-18 20:19:48,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771149537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:48,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135703676] [2022-11-18 20:19:48,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:19:48,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:48,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:48,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:48,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:19:48,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:19:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:19:48,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:49,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:49,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:49,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135703676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:49,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:49,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-18 20:19:49,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147321237] [2022-11-18 20:19:49,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:49,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:49,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:49,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:49,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:19:49,166 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:49,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 219 transitions, 1781 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:49,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:49,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:49,957 INFO L130 PetriNetUnfolder]: 232/733 cut-off events. [2022-11-18 20:19:49,958 INFO L131 PetriNetUnfolder]: For 4824/4824 co-relation queries the response was YES. [2022-11-18 20:19:49,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3297 conditions, 733 events. 232/733 cut-off events. For 4824/4824 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4374 event pairs, 36 based on Foata normal form. 1/723 useless extension candidates. Maximal degree in co-relation 3256. Up to 426 conditions per place. [2022-11-18 20:19:49,973 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 213 selfloop transitions, 72 changer transitions 4/330 dead transitions. [2022-11-18 20:19:49,973 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 330 transitions, 3461 flow [2022-11-18 20:19:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:19:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:19:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-18 20:19:49,977 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-18 20:19:49,977 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-18 20:19:49,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-18 20:19:49,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:49,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-18 20:19:49,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,985 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:49,985 INFO L175 Difference]: Start difference. First operand has 179 places, 219 transitions, 1781 flow. Second operand 18 states and 1004 transitions. [2022-11-18 20:19:49,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 330 transitions, 3461 flow [2022-11-18 20:19:50,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 330 transitions, 3111 flow, removed 163 selfloop flow, removed 8 redundant places. [2022-11-18 20:19:50,037 INFO L231 Difference]: Finished difference. Result has 195 places, 281 transitions, 2343 flow [2022-11-18 20:19:50,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2343, PETRI_PLACES=195, PETRI_TRANSITIONS=281} [2022-11-18 20:19:50,038 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 121 predicate places. [2022-11-18 20:19:50,038 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 281 transitions, 2343 flow [2022-11-18 20:19:50,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:50,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:50,039 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:50,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:50,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:50,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1203830056, now seen corresponding path program 3 times [2022-11-18 20:19:50,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:50,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357670209] [2022-11-18 20:19:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:50,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:50,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357670209] [2022-11-18 20:19:50,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357670209] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808968589] [2022-11-18 20:19:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:19:50,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:50,518 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:50,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:19:50,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-18 20:19:50,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:50,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:19:50,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:51,001 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:51,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808968589] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:51,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:51,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-18 20:19:51,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203372501] [2022-11-18 20:19:51,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:51,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:51,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:51,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:51,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:19:51,005 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:51,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 281 transitions, 2343 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:51,007 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:51,007 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:51,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:52,087 INFO L130 PetriNetUnfolder]: 312/949 cut-off events. [2022-11-18 20:19:52,087 INFO L131 PetriNetUnfolder]: For 5638/5638 co-relation queries the response was YES. [2022-11-18 20:19:52,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4318 conditions, 949 events. 312/949 cut-off events. For 5638/5638 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6113 event pairs, 41 based on Foata normal form. 1/938 useless extension candidates. Maximal degree in co-relation 4271. Up to 557 conditions per place. [2022-11-18 20:19:52,099 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 271 selfloop transitions, 96 changer transitions 4/412 dead transitions. [2022-11-18 20:19:52,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 412 transitions, 4325 flow [2022-11-18 20:19:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:19:52,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:19:52,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1165 transitions. [2022-11-18 20:19:52,106 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6604308390022676 [2022-11-18 20:19:52,107 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1165 transitions. [2022-11-18 20:19:52,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1165 transitions. [2022-11-18 20:19:52,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:52,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1165 transitions. [2022-11-18 20:19:52,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.476190476190474) internal successors, (1165), 21 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:52,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:52,120 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:52,120 INFO L175 Difference]: Start difference. First operand has 195 places, 281 transitions, 2343 flow. Second operand 21 states and 1165 transitions. [2022-11-18 20:19:52,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 412 transitions, 4325 flow [2022-11-18 20:19:52,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 412 transitions, 4311 flow, removed 3 selfloop flow, removed 5 redundant places. [2022-11-18 20:19:52,179 INFO L231 Difference]: Finished difference. Result has 218 places, 357 transitions, 3446 flow [2022-11-18 20:19:52,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=2331, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3446, PETRI_PLACES=218, PETRI_TRANSITIONS=357} [2022-11-18 20:19:52,181 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 144 predicate places. [2022-11-18 20:19:52,181 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 357 transitions, 3446 flow [2022-11-18 20:19:52,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:52,182 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:52,182 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:52,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:52,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 20:19:52,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:52,390 INFO L85 PathProgramCache]: Analyzing trace with hash 186380408, now seen corresponding path program 4 times [2022-11-18 20:19:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559843812] [2022-11-18 20:19:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:52,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:52,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559843812] [2022-11-18 20:19:52,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559843812] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:52,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:19:52,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:19:52,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888371427] [2022-11-18 20:19:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:52,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:19:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:19:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:19:52,627 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:52,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 357 transitions, 3446 flow. Second operand has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:52,628 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:52,628 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:52,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:53,214 INFO L130 PetriNetUnfolder]: 356/1063 cut-off events. [2022-11-18 20:19:53,214 INFO L131 PetriNetUnfolder]: For 7309/7309 co-relation queries the response was YES. [2022-11-18 20:19:53,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5310 conditions, 1063 events. 356/1063 cut-off events. For 7309/7309 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7029 event pairs, 52 based on Foata normal form. 1/1048 useless extension candidates. Maximal degree in co-relation 5254. Up to 550 conditions per place. [2022-11-18 20:19:53,231 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 263 selfloop transitions, 158 changer transitions 6/468 dead transitions. [2022-11-18 20:19:53,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 468 transitions, 5513 flow [2022-11-18 20:19:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:19:53,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-11-18 20:19:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 824 transitions. [2022-11-18 20:19:53,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.653968253968254 [2022-11-18 20:19:53,234 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 824 transitions. [2022-11-18 20:19:53,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 824 transitions. [2022-11-18 20:19:53,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:53,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 824 transitions. [2022-11-18 20:19:53,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 54.93333333333333) internal successors, (824), 15 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:53,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:53,240 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 84.0) internal successors, (1344), 16 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:53,241 INFO L175 Difference]: Start difference. First operand has 218 places, 357 transitions, 3446 flow. Second operand 15 states and 824 transitions. [2022-11-18 20:19:53,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 468 transitions, 5513 flow [2022-11-18 20:19:53,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 468 transitions, 5399 flow, removed 42 selfloop flow, removed 7 redundant places. [2022-11-18 20:19:53,323 INFO L231 Difference]: Finished difference. Result has 234 places, 433 transitions, 4871 flow [2022-11-18 20:19:53,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4871, PETRI_PLACES=234, PETRI_TRANSITIONS=433} [2022-11-18 20:19:53,325 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 160 predicate places. [2022-11-18 20:19:53,325 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 433 transitions, 4871 flow [2022-11-18 20:19:53,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 53.166666666666664) internal successors, (638), 12 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:53,325 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:53,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:53,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:19:53,326 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:53,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:53,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1350271786, now seen corresponding path program 5 times [2022-11-18 20:19:53,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:53,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528630377] [2022-11-18 20:19:53,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:53,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:53,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:53,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528630377] [2022-11-18 20:19:53,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528630377] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:53,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242164165] [2022-11-18 20:19:53,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:19:53,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:53,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:53,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:53,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:19:53,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-18 20:19:53,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:19:53,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:53,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:19:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:54,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242164165] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:19:54,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:19:54,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-11-18 20:19:54,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64648432] [2022-11-18 20:19:54,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:19:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:19:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:54,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:19:54,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:19:54,352 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:54,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 433 transitions, 4871 flow. Second operand has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:54,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:54,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:54,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:55,486 INFO L130 PetriNetUnfolder]: 493/1394 cut-off events. [2022-11-18 20:19:55,486 INFO L131 PetriNetUnfolder]: For 10884/10884 co-relation queries the response was YES. [2022-11-18 20:19:55,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 1394 events. 493/1394 cut-off events. For 10884/10884 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9767 event pairs, 34 based on Foata normal form. 1/1383 useless extension candidates. Maximal degree in co-relation 7626. Up to 444 conditions per place. [2022-11-18 20:19:55,511 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 202 selfloop transitions, 442 changer transitions 22/707 dead transitions. [2022-11-18 20:19:55,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 707 transitions, 9305 flow [2022-11-18 20:19:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:19:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 20:19:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1522 transitions. [2022-11-18 20:19:55,515 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6471088435374149 [2022-11-18 20:19:55,515 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1522 transitions. [2022-11-18 20:19:55,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1522 transitions. [2022-11-18 20:19:55,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:55,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1522 transitions. [2022-11-18 20:19:55,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.357142857142854) internal successors, (1522), 28 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:55,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:55,525 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:55,526 INFO L175 Difference]: Start difference. First operand has 234 places, 433 transitions, 4871 flow. Second operand 28 states and 1522 transitions. [2022-11-18 20:19:55,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 707 transitions, 9305 flow [2022-11-18 20:19:55,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 707 transitions, 9131 flow, removed 87 selfloop flow, removed 3 redundant places. [2022-11-18 20:19:55,713 INFO L231 Difference]: Finished difference. Result has 270 places, 636 transitions, 8547 flow [2022-11-18 20:19:55,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=8547, PETRI_PLACES=270, PETRI_TRANSITIONS=636} [2022-11-18 20:19:55,714 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 196 predicate places. [2022-11-18 20:19:55,714 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 636 transitions, 8547 flow [2022-11-18 20:19:55,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.0) internal successors, (1113), 21 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:55,715 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:55,715 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:55,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:55,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:55,916 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:55,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:55,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1996851174, now seen corresponding path program 6 times [2022-11-18 20:19:55,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:55,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435280899] [2022-11-18 20:19:55,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:56,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435280899] [2022-11-18 20:19:56,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435280899] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:56,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650819612] [2022-11-18 20:19:56,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:19:56,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:56,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:56,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:56,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:19:56,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:19:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:19:56,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:19:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:56,674 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:56,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650819612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:56,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:56,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-18 20:19:56,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436414388] [2022-11-18 20:19:56,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:56,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:56,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:56,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:56,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:19:56,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:56,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 636 transitions, 8547 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:56,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:56,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:56,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:19:58,036 INFO L130 PetriNetUnfolder]: 648/1770 cut-off events. [2022-11-18 20:19:58,037 INFO L131 PetriNetUnfolder]: For 17440/17440 co-relation queries the response was YES. [2022-11-18 20:19:58,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11260 conditions, 1770 events. 648/1770 cut-off events. For 17440/17440 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13008 event pairs, 57 based on Foata normal form. 1/1750 useless extension candidates. Maximal degree in co-relation 11181. Up to 1097 conditions per place. [2022-11-18 20:19:58,068 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 669 selfloop transitions, 170 changer transitions 4/884 dead transitions. [2022-11-18 20:19:58,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 884 transitions, 14042 flow [2022-11-18 20:19:58,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:19:58,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-18 20:19:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 910 transitions. [2022-11-18 20:19:58,073 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2022-11-18 20:19:58,073 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 910 transitions. [2022-11-18 20:19:58,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 910 transitions. [2022-11-18 20:19:58,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:19:58,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 910 transitions. [2022-11-18 20:19:58,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 56.875) internal successors, (910), 16 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:58,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:58,080 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 84.0) internal successors, (1428), 17 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:58,081 INFO L175 Difference]: Start difference. First operand has 270 places, 636 transitions, 8547 flow. Second operand 16 states and 910 transitions. [2022-11-18 20:19:58,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 884 transitions, 14042 flow [2022-11-18 20:19:58,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 884 transitions, 12889 flow, removed 171 selfloop flow, removed 17 redundant places. [2022-11-18 20:19:58,335 INFO L231 Difference]: Finished difference. Result has 268 places, 775 transitions, 10616 flow [2022-11-18 20:19:58,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10616, PETRI_PLACES=268, PETRI_TRANSITIONS=775} [2022-11-18 20:19:58,338 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 194 predicate places. [2022-11-18 20:19:58,338 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 775 transitions, 10616 flow [2022-11-18 20:19:58,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:58,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:19:58,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:19:58,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:19:58,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:58,546 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:19:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:19:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1099232000, now seen corresponding path program 7 times [2022-11-18 20:19:58,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:19:58,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395810076] [2022-11-18 20:19:58,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:19:58,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:19:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:58,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:58,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:19:58,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395810076] [2022-11-18 20:19:58,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395810076] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:19:58,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115067491] [2022-11-18 20:19:58,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:19:58,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:19:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:19:58,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:19:58,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:19:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:19:58,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:19:58,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:19:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:19:59,294 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:19:59,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115067491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:19:59,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:19:59,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-18 20:19:59,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516539878] [2022-11-18 20:19:59,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:19:59,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:19:59,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:19:59,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:19:59,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:19:59,299 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:19:59,300 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 775 transitions, 10616 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:19:59,300 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:19:59,300 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:19:59,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:00,742 INFO L130 PetriNetUnfolder]: 754/2051 cut-off events. [2022-11-18 20:20:00,742 INFO L131 PetriNetUnfolder]: For 19063/19063 co-relation queries the response was YES. [2022-11-18 20:20:00,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12880 conditions, 2051 events. 754/2051 cut-off events. For 19063/19063 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15800 event pairs, 82 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12799. Up to 1421 conditions per place. [2022-11-18 20:20:00,779 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 754 selfloop transitions, 147 changer transitions 4/946 dead transitions. [2022-11-18 20:20:00,779 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 946 transitions, 14840 flow [2022-11-18 20:20:00,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:20:00,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:20:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1006 transitions. [2022-11-18 20:20:00,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6653439153439153 [2022-11-18 20:20:00,782 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1006 transitions. [2022-11-18 20:20:00,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1006 transitions. [2022-11-18 20:20:00,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:00,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1006 transitions. [2022-11-18 20:20:00,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.888888888888886) internal successors, (1006), 18 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:00,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:00,789 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:00,789 INFO L175 Difference]: Start difference. First operand has 268 places, 775 transitions, 10616 flow. Second operand 18 states and 1006 transitions. [2022-11-18 20:20:00,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 946 transitions, 14840 flow [2022-11-18 20:20:01,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 946 transitions, 14537 flow, removed 133 selfloop flow, removed 7 redundant places. [2022-11-18 20:20:01,089 INFO L231 Difference]: Finished difference. Result has 285 places, 885 transitions, 12648 flow [2022-11-18 20:20:01,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=10343, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=12648, PETRI_PLACES=285, PETRI_TRANSITIONS=885} [2022-11-18 20:20:01,090 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 211 predicate places. [2022-11-18 20:20:01,090 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 885 transitions, 12648 flow [2022-11-18 20:20:01,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:01,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:01,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:01,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:01,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:20:01,292 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:01,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:01,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1566346522, now seen corresponding path program 8 times [2022-11-18 20:20:01,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:01,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608974949] [2022-11-18 20:20:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:01,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608974949] [2022-11-18 20:20:01,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608974949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:01,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989789754] [2022-11-18 20:20:01,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:01,607 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:01,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:20:01,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:01,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:01,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-18 20:20:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:02,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:20:02,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989789754] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:20:02,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:20:02,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 19 [2022-11-18 20:20:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774319307] [2022-11-18 20:20:02,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:20:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:20:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:20:02,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:20:02,111 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:02,112 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 885 transitions, 12648 flow. Second operand has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:02,112 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:02,112 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:02,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:03,819 INFO L130 PetriNetUnfolder]: 863/2328 cut-off events. [2022-11-18 20:20:03,819 INFO L131 PetriNetUnfolder]: For 23712/23712 co-relation queries the response was YES. [2022-11-18 20:20:03,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15320 conditions, 2328 events. 863/2328 cut-off events. For 23712/23712 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 18529 event pairs, 87 based on Foata normal form. 1/2295 useless extension candidates. Maximal degree in co-relation 15232. Up to 1642 conditions per place. [2022-11-18 20:20:03,849 INFO L137 encePairwiseOnDemand]: 72/84 looper letters, 852 selfloop transitions, 169 changer transitions 4/1066 dead transitions. [2022-11-18 20:20:03,849 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1066 transitions, 17666 flow [2022-11-18 20:20:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:20:03,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-18 20:20:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1163 transitions. [2022-11-18 20:20:03,852 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.659297052154195 [2022-11-18 20:20:03,852 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1163 transitions. [2022-11-18 20:20:03,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1163 transitions. [2022-11-18 20:20:03,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:03,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1163 transitions. [2022-11-18 20:20:03,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.38095238095238) internal successors, (1163), 21 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,860 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 84.0) internal successors, (1848), 22 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:03,860 INFO L175 Difference]: Start difference. First operand has 285 places, 885 transitions, 12648 flow. Second operand 21 states and 1163 transitions. [2022-11-18 20:20:03,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1066 transitions, 17666 flow [2022-11-18 20:20:04,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1066 transitions, 17236 flow, removed 185 selfloop flow, removed 8 redundant places. [2022-11-18 20:20:04,206 INFO L231 Difference]: Finished difference. Result has 305 places, 1005 transitions, 15083 flow [2022-11-18 20:20:04,207 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=12272, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=15083, PETRI_PLACES=305, PETRI_TRANSITIONS=1005} [2022-11-18 20:20:04,208 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 231 predicate places. [2022-11-18 20:20:04,222 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 1005 transitions, 15083 flow [2022-11-18 20:20:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 53.36363636363637) internal successors, (587), 11 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:04,223 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:04,224 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:04,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:04,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:20:04,430 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:04,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:04,431 INFO L85 PathProgramCache]: Analyzing trace with hash -613700161, now seen corresponding path program 9 times [2022-11-18 20:20:04,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:04,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117734902] [2022-11-18 20:20:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:04,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:04,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117734902] [2022-11-18 20:20:04,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117734902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:04,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837887704] [2022-11-18 20:20:04,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:20:04,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:04,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:04,701 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:04,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:20:04,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:20:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:20:04,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:05,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:05,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837887704] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:05,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:05,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-18 20:20:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758284595] [2022-11-18 20:20:05,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:20:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:20:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:20:05,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:05,325 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 1005 transitions, 15083 flow. Second operand has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:05,326 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:05,326 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:05,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:07,593 INFO L130 PetriNetUnfolder]: 1033/2762 cut-off events. [2022-11-18 20:20:07,593 INFO L131 PetriNetUnfolder]: For 30374/30388 co-relation queries the response was YES. [2022-11-18 20:20:07,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18380 conditions, 2762 events. 1033/2762 cut-off events. For 30374/30388 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22873 event pairs, 43 based on Foata normal form. 14/2758 useless extension candidates. Maximal degree in co-relation 18283. Up to 903 conditions per place. [2022-11-18 20:20:07,633 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 791 selfloop transitions, 455 changer transitions 0/1287 dead transitions. [2022-11-18 20:20:07,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1287 transitions, 21280 flow [2022-11-18 20:20:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:20:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:20:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1127 transitions. [2022-11-18 20:20:07,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2022-11-18 20:20:07,637 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1127 transitions. [2022-11-18 20:20:07,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1127 transitions. [2022-11-18 20:20:07,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:07,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1127 transitions. [2022-11-18 20:20:07,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 56.35) internal successors, (1127), 20 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,644 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 84.0) internal successors, (1764), 21 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:07,645 INFO L175 Difference]: Start difference. First operand has 305 places, 1005 transitions, 15083 flow. Second operand 20 states and 1127 transitions. [2022-11-18 20:20:07,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1287 transitions, 21280 flow [2022-11-18 20:20:08,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1287 transitions, 20662 flow, removed 291 selfloop flow, removed 7 redundant places. [2022-11-18 20:20:08,184 INFO L231 Difference]: Finished difference. Result has 326 places, 1163 transitions, 18690 flow [2022-11-18 20:20:08,185 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=14473, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=18690, PETRI_PLACES=326, PETRI_TRANSITIONS=1163} [2022-11-18 20:20:08,185 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 252 predicate places. [2022-11-18 20:20:08,185 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 1163 transitions, 18690 flow [2022-11-18 20:20:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.8) internal successors, (1076), 20 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:08,187 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:08,187 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:08,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:08,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:20:08,393 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:08,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1312073183, now seen corresponding path program 10 times [2022-11-18 20:20:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354346981] [2022-11-18 20:20:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:08,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:08,567 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:08,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354346981] [2022-11-18 20:20:08,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354346981] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:08,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209735707] [2022-11-18 20:20:08,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:20:08,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:08,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:08,570 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:08,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:20:08,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:20:08,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:08,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:20:08,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:08,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:09,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209735707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:09,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:09,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-11-18 20:20:09,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753245053] [2022-11-18 20:20:09,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:09,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:20:09,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:09,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:20:09,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:20:09,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:09,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 1163 transitions, 18690 flow. Second operand has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:09,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:09,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:09,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:11,408 INFO L130 PetriNetUnfolder]: 1107/2942 cut-off events. [2022-11-18 20:20:11,408 INFO L131 PetriNetUnfolder]: For 42498/42498 co-relation queries the response was YES. [2022-11-18 20:20:11,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21367 conditions, 2942 events. 1107/2942 cut-off events. For 42498/42498 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 24629 event pairs, 71 based on Foata normal form. 2/2911 useless extension candidates. Maximal degree in co-relation 21261. Up to 1612 conditions per place. [2022-11-18 20:20:11,465 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 930 selfloop transitions, 362 changer transitions 12/1345 dead transitions. [2022-11-18 20:20:11,465 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1345 transitions, 23894 flow [2022-11-18 20:20:11,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:20:11,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 20:20:11,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1004 transitions. [2022-11-18 20:20:11,480 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6640211640211641 [2022-11-18 20:20:11,481 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1004 transitions. [2022-11-18 20:20:11,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1004 transitions. [2022-11-18 20:20:11,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:11,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1004 transitions. [2022-11-18 20:20:11,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 55.77777777777778) internal successors, (1004), 18 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:11,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:11,493 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 84.0) internal successors, (1596), 19 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:11,494 INFO L175 Difference]: Start difference. First operand has 326 places, 1163 transitions, 18690 flow. Second operand 18 states and 1004 transitions. [2022-11-18 20:20:11,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1345 transitions, 23894 flow [2022-11-18 20:20:12,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1345 transitions, 23544 flow, removed 157 selfloop flow, removed 6 redundant places. [2022-11-18 20:20:12,086 INFO L231 Difference]: Finished difference. Result has 344 places, 1238 transitions, 21062 flow [2022-11-18 20:20:12,087 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=18344, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=284, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21062, PETRI_PLACES=344, PETRI_TRANSITIONS=1238} [2022-11-18 20:20:12,088 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 270 predicate places. [2022-11-18 20:20:12,088 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1238 transitions, 21062 flow [2022-11-18 20:20:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.7) internal successors, (1074), 20 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:12,089 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:12,089 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:12,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:12,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:20:12,300 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:12,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1339676861, now seen corresponding path program 11 times [2022-11-18 20:20:12,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:12,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629072563] [2022-11-18 20:20:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:12,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:12,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:12,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629072563] [2022-11-18 20:20:12,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629072563] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:12,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419111145] [2022-11-18 20:20:12,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:20:12,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:12,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:12,595 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:12,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:20:12,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:12,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:20:12,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:12,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:13,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419111145] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:13,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:13,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-18 20:20:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514125079] [2022-11-18 20:20:13,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:20:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:20:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:20:13,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:13,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1238 transitions, 21062 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:13,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:13,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:13,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:16,667 INFO L130 PetriNetUnfolder]: 1477/3889 cut-off events. [2022-11-18 20:20:16,667 INFO L131 PetriNetUnfolder]: For 72823/72823 co-relation queries the response was YES. [2022-11-18 20:20:16,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30669 conditions, 3889 events. 1477/3889 cut-off events. For 72823/72823 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 33593 event pairs, 64 based on Foata normal form. 14/3876 useless extension candidates. Maximal degree in co-relation 30556. Up to 992 conditions per place. [2022-11-18 20:20:16,771 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 709 selfloop transitions, 1069 changer transitions 26/1845 dead transitions. [2022-11-18 20:20:16,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 1845 transitions, 35908 flow [2022-11-18 20:20:16,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:20:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 20:20:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2165 transitions. [2022-11-18 20:20:16,777 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6608669108669109 [2022-11-18 20:20:16,777 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2165 transitions. [2022-11-18 20:20:16,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2165 transitions. [2022-11-18 20:20:16,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:16,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2165 transitions. [2022-11-18 20:20:16,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.51282051282051) internal successors, (2165), 39 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:16,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:16,792 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:16,792 INFO L175 Difference]: Start difference. First operand has 344 places, 1238 transitions, 21062 flow. Second operand 39 states and 2165 transitions. [2022-11-18 20:20:16,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 1845 transitions, 35908 flow [2022-11-18 20:20:17,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 1845 transitions, 35490 flow, removed 72 selfloop flow, removed 13 redundant places. [2022-11-18 20:20:17,818 INFO L231 Difference]: Finished difference. Result has 392 places, 1662 transitions, 33601 flow [2022-11-18 20:20:17,820 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=20683, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=33601, PETRI_PLACES=392, PETRI_TRANSITIONS=1662} [2022-11-18 20:20:17,820 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 318 predicate places. [2022-11-18 20:20:17,820 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1662 transitions, 33601 flow [2022-11-18 20:20:17,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:17,821 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:17,822 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:17,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:18,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:20:18,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:18,029 INFO L85 PathProgramCache]: Analyzing trace with hash 923816933, now seen corresponding path program 12 times [2022-11-18 20:20:18,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:18,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243162080] [2022-11-18 20:20:18,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:18,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:18,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:18,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243162080] [2022-11-18 20:20:18,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243162080] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:18,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782381645] [2022-11-18 20:20:18,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:20:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:18,199 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:18,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:20:18,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-18 20:20:18,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:20:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:18,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:18,828 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:18,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782381645] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:18,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:18,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-18 20:20:18,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710179891] [2022-11-18 20:20:18,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:18,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:20:18,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:18,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:20:18,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:20:18,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:18,834 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1662 transitions, 33601 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:18,834 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:18,834 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:18,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:25,232 INFO L130 PetriNetUnfolder]: 1926/5203 cut-off events. [2022-11-18 20:20:25,232 INFO L131 PetriNetUnfolder]: For 120334/120363 co-relation queries the response was YES. [2022-11-18 20:20:25,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45199 conditions, 5203 events. 1926/5203 cut-off events. For 120334/120363 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 47303 event pairs, 27 based on Foata normal form. 43/5240 useless extension candidates. Maximal degree in co-relation 45066. Up to 1189 conditions per place. [2022-11-18 20:20:25,361 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1139 selfloop transitions, 1224 changer transitions 2/2406 dead transitions. [2022-11-18 20:20:25,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2406 transitions, 53111 flow [2022-11-18 20:20:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:20:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 20:20:25,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3928 transitions. [2022-11-18 20:20:25,368 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586183769282361 [2022-11-18 20:20:25,369 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3928 transitions. [2022-11-18 20:20:25,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3928 transitions. [2022-11-18 20:20:25,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:25,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3928 transitions. [2022-11-18 20:20:25,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 55.32394366197183) internal successors, (3928), 71 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:25,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:25,391 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:25,391 INFO L175 Difference]: Start difference. First operand has 392 places, 1662 transitions, 33601 flow. Second operand 71 states and 3928 transitions. [2022-11-18 20:20:25,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2406 transitions, 53111 flow [2022-11-18 20:20:27,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 2406 transitions, 51897 flow, removed 587 selfloop flow, removed 8 redundant places. [2022-11-18 20:20:27,719 INFO L231 Difference]: Finished difference. Result has 488 places, 2225 transitions, 49344 flow [2022-11-18 20:20:27,721 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=32691, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=751, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=838, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=49344, PETRI_PLACES=488, PETRI_TRANSITIONS=2225} [2022-11-18 20:20:27,721 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 414 predicate places. [2022-11-18 20:20:27,722 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 2225 transitions, 49344 flow [2022-11-18 20:20:27,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:27,722 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:27,723 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:27,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:27,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:20:27,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:27,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1222382439, now seen corresponding path program 13 times [2022-11-18 20:20:27,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:27,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305658445] [2022-11-18 20:20:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:27,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:28,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305658445] [2022-11-18 20:20:28,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305658445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:28,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143873621] [2022-11-18 20:20:28,160 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:20:28,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:28,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:28,162 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:28,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:20:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:28,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:20:28,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:28,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:28,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143873621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:28,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:28,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2022-11-18 20:20:28,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180372944] [2022-11-18 20:20:28,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:28,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:20:28,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:28,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:20:28,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:20:28,798 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:28,800 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 2225 transitions, 49344 flow. Second operand has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:28,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:28,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:28,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:35,403 INFO L130 PetriNetUnfolder]: 2100/5423 cut-off events. [2022-11-18 20:20:35,403 INFO L131 PetriNetUnfolder]: For 142409/142428 co-relation queries the response was YES. [2022-11-18 20:20:35,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51953 conditions, 5423 events. 2100/5423 cut-off events. For 142409/142428 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 48815 event pairs, 87 based on Foata normal form. 10/5384 useless extension candidates. Maximal degree in co-relation 51787. Up to 1624 conditions per place. [2022-11-18 20:20:35,557 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 1302 selfloop transitions, 1264 changer transitions 5/2612 dead transitions. [2022-11-18 20:20:35,557 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 2612 transitions, 63217 flow [2022-11-18 20:20:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-18 20:20:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2022-11-18 20:20:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2179 transitions. [2022-11-18 20:20:35,562 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6651404151404151 [2022-11-18 20:20:35,562 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2179 transitions. [2022-11-18 20:20:35,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2179 transitions. [2022-11-18 20:20:35,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:35,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2179 transitions. [2022-11-18 20:20:35,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 55.87179487179487) internal successors, (2179), 39 states have internal predecessors, (2179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:35,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:35,575 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 84.0) internal successors, (3360), 40 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:35,575 INFO L175 Difference]: Start difference. First operand has 488 places, 2225 transitions, 49344 flow. Second operand 39 states and 2179 transitions. [2022-11-18 20:20:35,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 2612 transitions, 63217 flow [2022-11-18 20:20:39,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 2612 transitions, 60102 flow, removed 1491 selfloop flow, removed 10 redundant places. [2022-11-18 20:20:39,140 INFO L231 Difference]: Finished difference. Result has 522 places, 2405 transitions, 55186 flow [2022-11-18 20:20:39,141 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=46126, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1063, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1049, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=55186, PETRI_PLACES=522, PETRI_TRANSITIONS=2405} [2022-11-18 20:20:39,142 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 448 predicate places. [2022-11-18 20:20:39,142 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 2405 transitions, 55186 flow [2022-11-18 20:20:39,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.608695652173914) internal successors, (1233), 23 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:39,143 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:39,143 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:39,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:39,349 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1066815339, now seen corresponding path program 14 times [2022-11-18 20:20:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11399032] [2022-11-18 20:20:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11399032] [2022-11-18 20:20:39,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11399032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:39,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376683261] [2022-11-18 20:20:39,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:20:39,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:39,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:39,531 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:39,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:20:39,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:20:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:20:39,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:39,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:40,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376683261] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:40,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:40,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-18 20:20:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999109354] [2022-11-18 20:20:40,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:40,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:20:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:40,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:20:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:20:40,142 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:40,144 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 2405 transitions, 55186 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:40,144 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:40,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:40,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:20:49,935 INFO L130 PetriNetUnfolder]: 2373/6325 cut-off events. [2022-11-18 20:20:49,935 INFO L131 PetriNetUnfolder]: For 178048/178077 co-relation queries the response was YES. [2022-11-18 20:20:49,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60599 conditions, 6325 events. 2373/6325 cut-off events. For 178048/178077 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 59636 event pairs, 37 based on Foata normal form. 42/6361 useless extension candidates. Maximal degree in co-relation 60428. Up to 1851 conditions per place. [2022-11-18 20:20:50,040 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 1531 selfloop transitions, 1332 changer transitions 0/2904 dead transitions. [2022-11-18 20:20:50,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 2904 transitions, 72786 flow [2022-11-18 20:20:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-18 20:20:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2022-11-18 20:20:50,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3085 transitions. [2022-11-18 20:20:50,046 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6558248299319728 [2022-11-18 20:20:50,047 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3085 transitions. [2022-11-18 20:20:50,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3085 transitions. [2022-11-18 20:20:50,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:20:50,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3085 transitions. [2022-11-18 20:20:50,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 55.089285714285715) internal successors, (3085), 56 states have internal predecessors, (3085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,063 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 84.0) internal successors, (4788), 57 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:50,064 INFO L175 Difference]: Start difference. First operand has 522 places, 2405 transitions, 55186 flow. Second operand 56 states and 3085 transitions. [2022-11-18 20:20:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 2904 transitions, 72786 flow [2022-11-18 20:20:53,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2904 transitions, 71657 flow, removed 199 selfloop flow, removed 20 redundant places. [2022-11-18 20:20:53,463 INFO L231 Difference]: Finished difference. Result has 583 places, 2750 transitions, 67980 flow [2022-11-18 20:20:53,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=54114, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=67980, PETRI_PLACES=583, PETRI_TRANSITIONS=2750} [2022-11-18 20:20:53,467 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 509 predicate places. [2022-11-18 20:20:53,467 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 2750 transitions, 67980 flow [2022-11-18 20:20:53,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:53,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:20:53,467 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:20:53,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-18 20:20:53,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:53,668 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:20:53,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:20:53,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1696804425, now seen corresponding path program 15 times [2022-11-18 20:20:53,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:20:53,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976979784] [2022-11-18 20:20:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:20:53,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:20:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:20:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:20:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976979784] [2022-11-18 20:20:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976979784] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:20:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022874870] [2022-11-18 20:20:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:20:53,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:20:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:20:53,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:20:53,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:20:53,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:20:53,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:20:53,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:20:53,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:20:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:54,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:20:54,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:20:54,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022874870] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:20:54,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:20:54,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-18 20:20:54,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996998508] [2022-11-18 20:20:54,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:20:54,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:20:54,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:20:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:20:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:20:54,370 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:20:54,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 2750 transitions, 67980 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:20:54,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:20:54,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:20:54,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:04,703 INFO L130 PetriNetUnfolder]: 2586/7042 cut-off events. [2022-11-18 20:21:04,703 INFO L131 PetriNetUnfolder]: For 238413/238432 co-relation queries the response was YES. [2022-11-18 20:21:04,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71889 conditions, 7042 events. 2586/7042 cut-off events. For 238413/238432 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 68479 event pairs, 208 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 71692. Up to 2875 conditions per place. [2022-11-18 20:21:04,858 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2029 selfloop transitions, 1164 changer transitions 2/3236 dead transitions. [2022-11-18 20:21:04,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 3236 transitions, 86224 flow [2022-11-18 20:21:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-18 20:21:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2022-11-18 20:21:04,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2331 transitions. [2022-11-18 20:21:04,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2022-11-18 20:21:04,864 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2331 transitions. [2022-11-18 20:21:04,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2331 transitions. [2022-11-18 20:21:04,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:04,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2331 transitions. [2022-11-18 20:21:04,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 55.5) internal successors, (2331), 42 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:04,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:04,878 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 84.0) internal successors, (3612), 43 states have internal predecessors, (3612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:04,879 INFO L175 Difference]: Start difference. First operand has 583 places, 2750 transitions, 67980 flow. Second operand 42 states and 2331 transitions. [2022-11-18 20:21:04,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 3236 transitions, 86224 flow [2022-11-18 20:21:09,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 3236 transitions, 83117 flow, removed 981 selfloop flow, removed 12 redundant places. [2022-11-18 20:21:09,720 INFO L231 Difference]: Finished difference. Result has 635 places, 3110 transitions, 78635 flow [2022-11-18 20:21:09,722 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=65021, PETRI_DIFFERENCE_MINUEND_PLACES=571, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=858, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1772, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=78635, PETRI_PLACES=635, PETRI_TRANSITIONS=3110} [2022-11-18 20:21:09,723 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 561 predicate places. [2022-11-18 20:21:09,723 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 3110 transitions, 78635 flow [2022-11-18 20:21:09,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:09,724 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:09,724 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:09,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:09,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-18 20:21:09,930 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:09,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 770996869, now seen corresponding path program 16 times [2022-11-18 20:21:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:09,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403967184] [2022-11-18 20:21:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:10,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403967184] [2022-11-18 20:21:10,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403967184] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:10,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397722682] [2022-11-18 20:21:10,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:21:10,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:10,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:10,125 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:10,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:21:10,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:21:10,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:10,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:21:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:10,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:10,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397722682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:10,652 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:10,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-11-18 20:21:10,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857024302] [2022-11-18 20:21:10,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:10,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-18 20:21:10,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:10,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-18 20:21:10,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-11-18 20:21:10,657 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:21:10,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 3110 transitions, 78635 flow. Second operand has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:10,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:10,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:21:10,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:23,786 INFO L130 PetriNetUnfolder]: 3078/8114 cut-off events. [2022-11-18 20:21:23,786 INFO L131 PetriNetUnfolder]: For 309718/309747 co-relation queries the response was YES. [2022-11-18 20:21:23,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88078 conditions, 8114 events. 3078/8114 cut-off events. For 309718/309747 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 79452 event pairs, 213 based on Foata normal form. 22/8046 useless extension candidates. Maximal degree in co-relation 87860. Up to 4263 conditions per place. [2022-11-18 20:21:23,955 INFO L137 encePairwiseOnDemand]: 67/84 looper letters, 2646 selfloop transitions, 1234 changer transitions 35/3956 dead transitions. [2022-11-18 20:21:23,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 674 places, 3956 transitions, 110526 flow [2022-11-18 20:21:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:21:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2022-11-18 20:21:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2213 transitions. [2022-11-18 20:21:23,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6586309523809524 [2022-11-18 20:21:23,960 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2213 transitions. [2022-11-18 20:21:23,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2213 transitions. [2022-11-18 20:21:23,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:23,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2213 transitions. [2022-11-18 20:21:23,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 55.325) internal successors, (2213), 40 states have internal predecessors, (2213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:23,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:23,971 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 84.0) internal successors, (3444), 41 states have internal predecessors, (3444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:23,971 INFO L175 Difference]: Start difference. First operand has 635 places, 3110 transitions, 78635 flow. Second operand 40 states and 2213 transitions. [2022-11-18 20:21:23,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 674 places, 3956 transitions, 110526 flow [2022-11-18 20:21:30,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 3956 transitions, 107464 flow, removed 1013 selfloop flow, removed 9 redundant places. [2022-11-18 20:21:30,551 INFO L231 Difference]: Finished difference. Result has 687 places, 3611 transitions, 95082 flow [2022-11-18 20:21:30,553 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=76222, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2078, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=95082, PETRI_PLACES=687, PETRI_TRANSITIONS=3611} [2022-11-18 20:21:30,553 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 613 predicate places. [2022-11-18 20:21:30,553 INFO L495 AbstractCegarLoop]: Abstraction has has 687 places, 3611 transitions, 95082 flow [2022-11-18 20:21:30,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 53.523809523809526) internal successors, (1124), 21 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:30,554 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:30,554 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:30,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:30,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-18 20:21:30,754 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash -1814685321, now seen corresponding path program 17 times [2022-11-18 20:21:30,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:30,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070668382] [2022-11-18 20:21:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:30,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:30,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070668382] [2022-11-18 20:21:30,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070668382] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:30,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272547362] [2022-11-18 20:21:30,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:21:30,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:30,919 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:30,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:21:31,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-18 20:21:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-18 20:21:31,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:31,257 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:31,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:31,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272547362] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:31,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:31,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 27 [2022-11-18 20:21:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616791429] [2022-11-18 20:21:31,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:21:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:21:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:21:31,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:21:31,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 687 places, 3611 transitions, 95082 flow. Second operand has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:31,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:31,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:21:31,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:21:48,556 INFO L130 PetriNetUnfolder]: 3266/8672 cut-off events. [2022-11-18 20:21:48,557 INFO L131 PetriNetUnfolder]: For 369914/369949 co-relation queries the response was YES. [2022-11-18 20:21:48,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97488 conditions, 8672 events. 3266/8672 cut-off events. For 369914/369949 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 86199 event pairs, 10 based on Foata normal form. 74/8744 useless extension candidates. Maximal degree in co-relation 97250. Up to 1563 conditions per place. [2022-11-18 20:21:48,747 INFO L137 encePairwiseOnDemand]: 64/84 looper letters, 205 selfloop transitions, 3539 changer transitions 364/4149 dead transitions. [2022-11-18 20:21:48,747 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 754 places, 4149 transitions, 119426 flow [2022-11-18 20:21:48,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:21:48,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 20:21:48,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 3830 transitions. [2022-11-18 20:21:48,753 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.642186452045607 [2022-11-18 20:21:48,753 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 3830 transitions. [2022-11-18 20:21:48,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 3830 transitions. [2022-11-18 20:21:48,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:21:48,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 3830 transitions. [2022-11-18 20:21:48,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 53.943661971830984) internal successors, (3830), 71 states have internal predecessors, (3830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:48,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:48,767 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 84.0) internal successors, (6048), 72 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:48,767 INFO L175 Difference]: Start difference. First operand has 687 places, 3611 transitions, 95082 flow. Second operand 71 states and 3830 transitions. [2022-11-18 20:21:48,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 754 places, 4149 transitions, 119426 flow [2022-11-18 20:21:57,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 736 places, 4149 transitions, 116682 flow, removed 1029 selfloop flow, removed 18 redundant places. [2022-11-18 20:21:57,282 INFO L231 Difference]: Finished difference. Result has 753 places, 3754 transitions, 108291 flow [2022-11-18 20:21:57,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=92150, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3099, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=108291, PETRI_PLACES=753, PETRI_TRANSITIONS=3754} [2022-11-18 20:21:57,284 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 679 predicate places. [2022-11-18 20:21:57,285 INFO L495 AbstractCegarLoop]: Abstraction has has 753 places, 3754 transitions, 108291 flow [2022-11-18 20:21:57,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 53.592592592592595) internal successors, (1447), 27 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:57,285 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:21:57,285 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:21:57,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:21:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:57,486 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:21:57,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:21:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 814750091, now seen corresponding path program 18 times [2022-11-18 20:21:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:21:57,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703137334] [2022-11-18 20:21:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:21:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:21:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:21:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:57,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:21:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703137334] [2022-11-18 20:21:57,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703137334] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:21:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372448603] [2022-11-18 20:21:57,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:21:57,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:21:57,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:21:57,650 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:21:57,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:21:57,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-18 20:21:57,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:21:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:21:57,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:21:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:21:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:21:58,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372448603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:21:58,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:21:58,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-18 20:21:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643052447] [2022-11-18 20:21:58,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:21:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:21:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:21:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:21:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:21:58,176 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:21:58,177 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 3754 transitions, 108291 flow. Second operand has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:21:58,177 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:21:58,177 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:21:58,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:22:12,856 INFO L130 PetriNetUnfolder]: 3140/7583 cut-off events. [2022-11-18 20:22:12,856 INFO L131 PetriNetUnfolder]: For 359610/359645 co-relation queries the response was YES. [2022-11-18 20:22:12,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98078 conditions, 7583 events. 3140/7583 cut-off events. For 359610/359645 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69586 event pairs, 208 based on Foata normal form. 26/7521 useless extension candidates. Maximal degree in co-relation 97829. Up to 4341 conditions per place. [2022-11-18 20:22:13,042 INFO L137 encePairwiseOnDemand]: 69/84 looper letters, 2608 selfloop transitions, 1472 changer transitions 4/4125 dead transitions. [2022-11-18 20:22:13,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 4125 transitions, 127508 flow [2022-11-18 20:22:13,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:22:13,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:22:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1382 transitions. [2022-11-18 20:22:13,045 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6580952380952381 [2022-11-18 20:22:13,046 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1382 transitions. [2022-11-18 20:22:13,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1382 transitions. [2022-11-18 20:22:13,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:22:13,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1382 transitions. [2022-11-18 20:22:13,049 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 55.28) internal successors, (1382), 25 states have internal predecessors, (1382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:13,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:13,053 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 84.0) internal successors, (2184), 26 states have internal predecessors, (2184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:13,053 INFO L175 Difference]: Start difference. First operand has 753 places, 3754 transitions, 108291 flow. Second operand 25 states and 1382 transitions. [2022-11-18 20:22:13,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 4125 transitions, 127508 flow [2022-11-18 20:22:21,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 4125 transitions, 114144 flow, removed 2750 selfloop flow, removed 51 redundant places. [2022-11-18 20:22:21,644 INFO L231 Difference]: Finished difference. Result has 711 places, 3907 transitions, 106333 flow [2022-11-18 20:22:21,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=96103, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=106333, PETRI_PLACES=711, PETRI_TRANSITIONS=3907} [2022-11-18 20:22:21,646 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 637 predicate places. [2022-11-18 20:22:21,647 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 3907 transitions, 106333 flow [2022-11-18 20:22:21,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.391304347826086) internal successors, (1228), 23 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:21,647 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:22:21,648 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:21,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 20:22:21,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-18 20:22:21,854 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:22:21,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash -789623059, now seen corresponding path program 19 times [2022-11-18 20:22:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:21,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66529927] [2022-11-18 20:22:21,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:22,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66529927] [2022-11-18 20:22:22,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66529927] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:22,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549021419] [2022-11-18 20:22:22,019 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:22:22,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:22,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:22,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:22,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:22:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:22,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:22:22,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:22,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:22,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549021419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:22,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:22:22,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 25 [2022-11-18 20:22:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989392640] [2022-11-18 20:22:22,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:22,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:22:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:22:22,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:22:22,638 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:22:22,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 3907 transitions, 106333 flow. Second operand has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:22,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:22:22,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:22:22,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:22:38,171 INFO L130 PetriNetUnfolder]: 3306/8039 cut-off events. [2022-11-18 20:22:38,171 INFO L131 PetriNetUnfolder]: For 339182/339201 co-relation queries the response was YES. [2022-11-18 20:22:38,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96028 conditions, 8039 events. 3306/8039 cut-off events. For 339182/339201 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 74722 event pairs, 141 based on Foata normal form. 15/7979 useless extension candidates. Maximal degree in co-relation 95802. Up to 2786 conditions per place. [2022-11-18 20:22:38,374 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2397 selfloop transitions, 1771 changer transitions 5/4214 dead transitions. [2022-11-18 20:22:38,374 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 738 places, 4214 transitions, 123959 flow [2022-11-18 20:22:38,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:22:38,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-18 20:22:38,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1553 transitions. [2022-11-18 20:22:38,377 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6602891156462585 [2022-11-18 20:22:38,377 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1553 transitions. [2022-11-18 20:22:38,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1553 transitions. [2022-11-18 20:22:38,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:22:38,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1553 transitions. [2022-11-18 20:22:38,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 55.464285714285715) internal successors, (1553), 28 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:38,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:38,384 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 84.0) internal successors, (2436), 29 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:38,385 INFO L175 Difference]: Start difference. First operand has 711 places, 3907 transitions, 106333 flow. Second operand 28 states and 1553 transitions. [2022-11-18 20:22:38,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 738 places, 4214 transitions, 123959 flow [2022-11-18 20:22:46,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 4214 transitions, 122240 flow, removed 807 selfloop flow, removed 8 redundant places. [2022-11-18 20:22:46,293 INFO L231 Difference]: Finished difference. Result has 743 places, 4143 transitions, 119554 flow [2022-11-18 20:22:46,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=104810, PETRI_DIFFERENCE_MINUEND_PLACES=703, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=119554, PETRI_PLACES=743, PETRI_TRANSITIONS=4143} [2022-11-18 20:22:46,295 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 669 predicate places. [2022-11-18 20:22:46,296 INFO L495 AbstractCegarLoop]: Abstraction has has 743 places, 4143 transitions, 119554 flow [2022-11-18 20:22:46,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 53.36) internal successors, (1334), 25 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:46,296 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:22:46,296 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:22:46,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:22:46,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:22:46,497 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:22:46,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:22:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1480117485, now seen corresponding path program 20 times [2022-11-18 20:22:46,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:22:46,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615202174] [2022-11-18 20:22:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:22:46,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:22:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:22:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:46,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:22:46,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615202174] [2022-11-18 20:22:46,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615202174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:22:46,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103330762] [2022-11-18 20:22:46,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:22:46,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:22:46,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:22:46,715 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:22:46,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:22:46,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:22:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:22:46,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:22:46,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:22:47,031 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:47,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:22:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:22:47,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103330762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:22:47,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:22:47,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-18 20:22:47,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265885686] [2022-11-18 20:22:47,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:22:47,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:22:47,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:22:47,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:22:47,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:22:47,228 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:22:47,229 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 743 places, 4143 transitions, 119554 flow. Second operand has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:22:47,229 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:22:47,229 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:22:47,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:03,687 INFO L130 PetriNetUnfolder]: 3314/7942 cut-off events. [2022-11-18 20:23:03,687 INFO L131 PetriNetUnfolder]: For 385610/385629 co-relation queries the response was YES. [2022-11-18 20:23:03,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100437 conditions, 7942 events. 3314/7942 cut-off events. For 385610/385629 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 72883 event pairs, 219 based on Foata normal form. 30/7878 useless extension candidates. Maximal degree in co-relation 100200. Up to 3548 conditions per place. [2022-11-18 20:23:03,886 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2570 selfloop transitions, 1645 changer transitions 2/4258 dead transitions. [2022-11-18 20:23:03,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 4258 transitions, 130862 flow [2022-11-18 20:23:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:23:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 20:23:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1809 transitions. [2022-11-18 20:23:03,889 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6525974025974026 [2022-11-18 20:23:03,890 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1809 transitions. [2022-11-18 20:23:03,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1809 transitions. [2022-11-18 20:23:03,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:03,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1809 transitions. [2022-11-18 20:23:03,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 54.81818181818182) internal successors, (1809), 33 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:03,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:03,896 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 84.0) internal successors, (2856), 34 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:03,896 INFO L175 Difference]: Start difference. First operand has 743 places, 4143 transitions, 119554 flow. Second operand 33 states and 1809 transitions. [2022-11-18 20:23:03,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 4258 transitions, 130862 flow [2022-11-18 20:23:12,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 759 places, 4258 transitions, 129612 flow, removed 579 selfloop flow, removed 14 redundant places. [2022-11-18 20:23:12,662 INFO L231 Difference]: Finished difference. Result has 762 places, 4195 transitions, 125049 flow [2022-11-18 20:23:12,664 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=117657, PETRI_DIFFERENCE_MINUEND_PLACES=727, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=125049, PETRI_PLACES=762, PETRI_TRANSITIONS=4195} [2022-11-18 20:23:12,665 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 688 predicate places. [2022-11-18 20:23:12,665 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 4195 transitions, 125049 flow [2022-11-18 20:23:12,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 53.47826086956522) internal successors, (1230), 23 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:12,666 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:12,666 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:12,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:23:12,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:12,871 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:12,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:12,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1898688641, now seen corresponding path program 21 times [2022-11-18 20:23:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:12,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954555440] [2022-11-18 20:23:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:13,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954555440] [2022-11-18 20:23:13,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954555440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:23:13,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475896515] [2022-11-18 20:23:13,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:23:13,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:13,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:13,015 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:13,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:23:13,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:23:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:23:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:23:13,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:13,342 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:13,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:13,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475896515] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:13,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:23:13,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-18 20:23:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805709010] [2022-11-18 20:23:13,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:13,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 20:23:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 20:23:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-11-18 20:23:13,552 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:23:13,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 4195 transitions, 125049 flow. Second operand has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:13,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:13,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:23:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:23:33,103 INFO L130 PetriNetUnfolder]: 3523/8421 cut-off events. [2022-11-18 20:23:33,103 INFO L131 PetriNetUnfolder]: For 454402/454437 co-relation queries the response was YES. [2022-11-18 20:23:33,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110901 conditions, 8421 events. 3523/8421 cut-off events. For 454402/454437 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 77802 event pairs, 223 based on Foata normal form. 44/8370 useless extension candidates. Maximal degree in co-relation 110665. Up to 3858 conditions per place. [2022-11-18 20:23:33,321 INFO L137 encePairwiseOnDemand]: 68/84 looper letters, 2934 selfloop transitions, 1657 changer transitions 7/4639 dead transitions. [2022-11-18 20:23:33,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 4639 transitions, 149214 flow [2022-11-18 20:23:33,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:23:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 20:23:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2727 transitions. [2022-11-18 20:23:33,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6492857142857142 [2022-11-18 20:23:33,326 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2727 transitions. [2022-11-18 20:23:33,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2727 transitions. [2022-11-18 20:23:33,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:23:33,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2727 transitions. [2022-11-18 20:23:33,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 54.54) internal successors, (2727), 50 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:33,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:33,337 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 84.0) internal successors, (4284), 51 states have internal predecessors, (4284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:33,337 INFO L175 Difference]: Start difference. First operand has 762 places, 4195 transitions, 125049 flow. Second operand 50 states and 2727 transitions. [2022-11-18 20:23:33,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 4639 transitions, 149214 flow [2022-11-18 20:23:42,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 4639 transitions, 147844 flow, removed 164 selfloop flow, removed 20 redundant places. [2022-11-18 20:23:42,958 INFO L231 Difference]: Finished difference. Result has 810 places, 4482 transitions, 140290 flow [2022-11-18 20:23:42,961 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=123349, PETRI_DIFFERENCE_MINUEND_PLACES=740, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=140290, PETRI_PLACES=810, PETRI_TRANSITIONS=4482} [2022-11-18 20:23:42,961 INFO L288 CegarLoopForPetriNet]: 74 programPoint places, 736 predicate places. [2022-11-18 20:23:42,961 INFO L495 AbstractCegarLoop]: Abstraction has has 810 places, 4482 transitions, 140290 flow [2022-11-18 20:23:42,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 53.54545454545455) internal successors, (1178), 22 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:42,962 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:23:42,962 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:23:42,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:23:43,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:43,167 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:23:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:23:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1315811141, now seen corresponding path program 22 times [2022-11-18 20:23:43,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:23:43,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702717914] [2022-11-18 20:23:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:23:43,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:23:43,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:23:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:43,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:23:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702717914] [2022-11-18 20:23:43,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702717914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:23:43,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582273229] [2022-11-18 20:23:43,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:23:43,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:23:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:23:43,335 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:23:43,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_20d7f95a-e791-4d20-896d-d774305c8a12/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:23:43,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:23:43,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:23:43,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:23:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:23:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:43,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:23:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:23:43,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582273229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:23:43,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:23:43,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2022-11-18 20:23:43,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339590093] [2022-11-18 20:23:43,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:23:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:23:43,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:23:43,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:23:43,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:23:43,898 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 84 [2022-11-18 20:23:43,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 810 places, 4482 transitions, 140290 flow. Second operand has 23 states, 23 states have (on average 53.34782608695652) internal successors, (1227), 23 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:23:43,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:23:43,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 84 [2022-11-18 20:23:43,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand